EP1826085A2 - Betriebsbremsrelais mit integriertem Schnelllöseventil - Google Patents
Betriebsbremsrelais mit integriertem Schnelllöseventil Download PDFInfo
- Publication number
- EP1826085A2 EP1826085A2 EP07250504A EP07250504A EP1826085A2 EP 1826085 A2 EP1826085 A2 EP 1826085A2 EP 07250504 A EP07250504 A EP 07250504A EP 07250504 A EP07250504 A EP 07250504A EP 1826085 A2 EP1826085 A2 EP 1826085A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- brake
- port
- service
- body portion
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/36—Other control devices or valves characterised by definite functions
- B60T15/52—Other control devices or valves characterised by definite functions for quick release of brakes, e.g. for influencing counter- pressure in triple valve or recirculating air from reservoir or brake cylinder to brake pipe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
Definitions
- the subject invention pertains to a single valve assembly for a vehicle brake system that provides a spring brake quick release valve function as well as a rear axle service brake relay valve function.
- Heavy vehicles such as trucks, typically include brake systems that pneumatically apply rear service brakes.
- an emergency brake arrangement is included within the brake systems to protect against brake failure in an event of loss of air pressure.
- the emergency brake arrangement comprises a spring that applies a mechanical brake force if an air pressure loss event occurs.
- This type of arrangement utilizes brake actuators that have a service air chamber and a spring chamber.
- the service air chamber is selectively pressurized to apply a braking force in response to a service brake request.
- the spring chamber houses a spring that is biased to apply a braking force. Air pressure within the spring chamber acts against the bias of the spring to hold off any braking force that would be imposed by the spring. In an emergency situation such as a loss of air pressure, the bias of the spring automatically applies the service brakes.
- This spring arrangement can also be utilized as a parking brake.
- a parking brake request When a parking brake request is initiated, air is exhausted from the spring chamber and the bias of the spring applies the service brakes to provide a parking brake function.
- Current braking systems for heavy vehicles utilize a rear axle service brake relay valve and a separate spring brake quick release valve.
- the rear axle service brake relay valve controls a supply of reservoir air to rear axle service brakes.
- the spring brake quick release valve provides air to apply or release the parking brake as needed.
- the rear axle service brake relay valve and the spring brake quick release valve are connected with an air line that delivers service brake air to the parking brake whenever the service brake is applied. If the parking brake is released and a service brake application is made, then service air sent to the spring brake quick release valve has no effect because the service air is blocked by a two-way check valve included within the spring brake quick release valve. If the parking brake is applied then there is no pressure to block the service air from opening the two-way check valve. Service air can then enter the spring brake quick release valve, which then delivers air to the spring brake chambers, which reduces the applied force of the spring. This is often referred to as anti-compounding.
- the spring brake quick release valve and the rear axle service brake relay valve each require a certain amount of mounting space within the vehicle, as well as requiring separate mounting hardware. This increases cost and assembly time. Also, the air line that extends between the rear axle service brake valve and the spring brake quick release valve to prevent compounding takes up valuable mounting space within the vehicle and increases cost. Further, the air line is vulnerable to damage, which could result in a loss of air pressure, and consequently reduced braking performance.
- a combination quick release and service relay brake valve assembly includes a single valve body having a quick release portion and a service relay portion.
- the quick release portion has a parking brake port and a service brake control port.
- the service relay portion has a supply port that receives air from a service brake air reservoir and a delivery port fluidly connected to a brake actuator that generates service brake requests.
- the service brake control port is fluidly connected to a relay control passage and an anti-compounding passage formed within the valve body.
- the quick release portion of the valve body comprises a main body portion, a valve seat portion, and a cover portion that includes at least one exhaust port.
- the quick release portion also includes a double check valve assembly having a first diaphragm positioned between the main body portion and valve seat portion, and a second diaphragm positioned between the main body portion and the cover portion.
- the first diaphragm may seal the anti-compounding passage or selectively seals off the parking brake port and directs air toward the second diaphragm.
- the second diaphragm moves to either seal off the exhaust port to allow air to be delivered to spring brake air chambers, or seals off the parking brake port and anti-compounding passage to exhaust air from brake air chambers via the exhaust port.
- the service relay portion of the valve body comprises a main body portion, an exhaust body portion movable within the main body portion and defining an exhaust passage, and a cover portion.
- the service relay portion also includes a piston and a spring received within the main body portion.
- the piston is movable between a service brake applied and service brake released position.
- the spring biases the piston to the service brake released position.
- air pressure is exerted against the piston, which moves to seal off the exhaust passage and to open a delivery port to supply air to the brake air chambers.
- the combination quick release and service relay brake valve assembly consolidates multiple valve functions within a common valve assembly, which reduces cost and overall complexity in an associated vehicle brake system.
- a vehicle brake system is shown generally at 10 in Figure 1.
- the vehicle brake system includes a supply sub-system including a compressor 12, governor 14, and air dryer 16 connected as shown.
- the supply sub-system supplies air to primary 18 and secondary 20 service brake reservoirs.
- a supply wet tank 22 cooperates with the air dryer 16 to supply dry air to the primary 18 and secondary 20 service brake reservoirs as known.
- the supply wet tank 22 includes a drain valve assembly 24 to remove water from the system.
- the primary 18 and secondary 20 service brake reservoirs each include an air gauge 25, check valve 28, and drain valve 30.
- a low pressure indicator switch 32 monitors pressure within the supply sub-system.
- a front axle 34 includes front service brake chambers 36 and slack adjusters 38 located at each front wheel 40.
- a front axle valve package 42 cooperates with the supply sub-system to deliver service air to the front service brake chambers 36.
- the front axle valve package 42 includes a quick release valve 44 and anti-lock brake system (ABS) components 26.
- the ABS components 26 comprise an electronic control unit (ECU), modular valves, sensors, and tooth rings as known.
- a rear axle 50 includes rear service brake chambers 52 and slack adjusters 54 located at each rear wheel 56.
- a rear axle valve package 58 cooperates with the supply sub-system to deliver service air to the rear service brake chambers 52.
- the rear axle valve package includes a combination quick release and service relay valve assembly 60, and ABS components 62 similar to those described above with regard to the ABS components 26 for the front axle 34.
- a park brake dash valve 63 or spring brake inversion control valve 64 cooperates with the reservoirs to control air supply to a quick release valve body portion 66 of the combination quick release and service relay valve assembly 60, and then on to spring chambers 65 that are used for a parking brake 67 located at each rear wheel 56.
- An input such as a foot pedal P, communicates operator service brake requests to a service brake control port 78 of the combination quick release and service relay valve assembly 60.
- the combination quick release and service relay valve assembly 60 is shown in greater detail in Figure 2.
- the combination quick release and service relay valve assembly 60 comprises a single valve body with the quick release valve body portion 66 and a service relay valve body portion 48 that are fitted together.
- the quick release valve body portion 66 comprises a main body portion 68, a valve seat member 70, and a cover 72.
- the quick release valve body portion 66 includes a double check valve with a first diaphragm 74 and a second diaphragm 76.
- the first diaphragm 74 is positioned between the valve seat member 70 and the main body portion 68
- the second diaphragm 76 is positioned between the main body portion 68 and the cover 72.
- the quick release valve body portion 66 includes an anti-compounding passage 88 formed within the valve seat member 70 and a parking brake port 80 that is formed within the main body portion 68.
- a delivery port 82 is also formed within the main body portion 68. The delivery port 82 is adapted to deliver air to the spring chambers 65 for the parking brakes 67 ( Figure 1).
- the valve seat member 70 is received within an opening at one end of the main body portion 68.
- the valve seat member 70 includes a curved surface 86 with an anti-compounding passage 88 that is in fluid communication with the service brake control port 78.
- the first diaphragm 74 moves to selectively seal the anti-compounding passage 88 under certain conditions. This will be discussed in greater detail below.
- the cover 72 is preferably cup-shaped and extends into a cavity 90 of the main body portion 68.
- the cover 72 includes a plurality of exhaust ports 92 that exhaust air from the quick release valve body portion 66 under certain conditions.
- the parking brake port 80 is in fluid communication with a first passage portion 94 formed within the main body portion 68.
- the first passage portion 94 is in fluid communication with a second passage portion 96 that forms a cavity to receive the first diaphragm 74 when the service brake control port 78 and anti-compounding passage 88 are pressurized.
- the first diaphragm 74 is received within a first chamber 98 formed between the valve seat member 70 and the main body portion 68.
- the second diaphragm 76 is received within a second chamber 100 formed between the main body portion 68 and cover 72.
- a third passage portion 102 formed within the main body portion 68, fluidly connects the first 98 and second 100 chambers.
- the first diaphragm 74 folds in on itself within the second passage portion 96, which allows air to flow through the first chamber 98 and into the third passage portion 102. Pressurized air flows from the third passage portion 102 to exert a pressure force on the second diaphragm 76, which moves away from a seat portion 104 toward the cover 72.
- the second diaphragm 76 seals the exhaust ports 92 and opens access to the delivery port 82 to allow air to be supplied to the spring brake chambers 65. The spring brake force is therefore reduced and the anti-compounding function is accomplished.
- the first diaphragm 74 moves away from the second passage portion 96 to engage the curved surface 86 and seal off the anti-compounding passage 88. Air flows through the first chamber 98, into the third passage portion 102, which causes the second diaphragm to seal off the exhaust ports 92 and open the delivery port 82 as described above.
- pressurized air from the spring chambers 65 is exhausted through the delivery port 82 into the second chamber 100. This causes the second diaphragm 76 to seal against seat portion 104 to prevent air from entering the third passage portion 102. This movement also opens the exhaust port 92, such that air can be vented from the spring chambers 65 to apply the parking brakes 67.
- the service relay valve body portion 48 includes a main body portion 110, an exhaust portion 112 that is movable relative to the main body portion 110, and a cover portion 114.
- the main body portion 110 defines a first chamber 116 and a second chamber 118.
- the main body portion 110 defines a control passage 120 that is in fluid communication with the service brake control port 78 of the quick release valve body portion 66.
- a supply port 124 is connected to the primary service brake air reservoir 18 ( Figure 1).
- the supply port 124 is formed within the main body portion 110.
- the main body portion 110 also includes a delivery port 122 that delivers air to the brake air chambers.
- a valve assembly 126 is received within the first chamber 116.
- the valve assembly 126 includes a piston 128, spring 130, and an exhaust seal 132 that is attached to the piston 128 with a fastener 134.
- the piston 128 has a first side 136 that faces the control passage 120 and a second side 138 that faces the exhaust portion 112.
- the piston 128 has a cavity 140 formed at the second side 138 that includes a base 142 and a side wall 144 that extends away from the base 142.
- the exhaust seal 132 has a smaller diameter than the piston 128 and is mounted to the piston 128 on the second side 138 within the cavity 140.
- the spring 130 is also mounted within the cavity 140.
- the spring 130 reacts between the second side 138 of the piston 128 and a spring seat 146 formed within the main body portion 110.
- the piston 128 is moveable between a service brakes applied position and a service brakes released position.
- the spring 130 biases the piston 128 to the service brakes released position but allows communication between the control passage 120 and the first side 136 of the piston 128.
- An O-ring seal 148 is also used to provide a sealing interface between the main body portion 110 of the service relay valve and the quick release valve body portion 66.
- the exhaust portion 112 has a first end 150 that extends into the first chamber 116 and a second end 152 that extends into the second chamber 118.
- the exhaust portion 112 defines an exhaust passage 154 that extends from the first chamber 116 to exhaust ports 156 formed within the cover portion 114.
- the exhaust portion 112 includes an outer flange 158 that rests against a seat portion 160 when the piston 128 is in a service brakes released position.
- the second end 152 is received within an opening 162 of the cover portion 114.
- An o-ring seal 164 provides a sealed interface between the exhaust portion 112 and the cover portion 114.
- Another o-ring seal 166 provides a sealed interface between the cover portion 114 and the main body portion 110.
- a spring 168 is positioned within the second chamber 118 and reacts between the outer flange 158 and a spring seat 170 formed within the cover portion 114.
- the exhaust portion 112 is movable in a linear direction between an exhaust position and a non-exhaust portion.
- the spring 168 biases the exhaust portion 112 against the seat portion 160.
- the combination quick release and service relay valve assembly 60 provides a unitary and compact valve assembly, which consolidates multiple valve functions within a common valve assembly, resulting in reduced cost and overall complexity for the vehicle brake system 10.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/355,383 US7658453B2 (en) | 2006-02-16 | 2006-02-16 | Service brake relay with integrated quick release valve |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1826085A2 true EP1826085A2 (de) | 2007-08-29 |
Family
ID=38261689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07250504A Withdrawn EP1826085A2 (de) | 2006-02-16 | 2007-02-07 | Betriebsbremsrelais mit integriertem Schnelllöseventil |
Country Status (2)
Country | Link |
---|---|
US (1) | US7658453B2 (de) |
EP (1) | EP1826085A2 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102069791A (zh) * | 2010-12-22 | 2011-05-25 | 芜湖盛力制动有限责任公司 | 一种重型卡车制动***的差动继动阀 |
ITMI20111121A1 (it) * | 2011-06-21 | 2012-12-22 | Catai S R L | Impianto frenante di assali di ruote di un rimorchio |
CN106114486A (zh) * | 2016-07-14 | 2016-11-16 | 徐州重型机械有限公司 | 一种abs电‑气控继动阀 |
DE102017009954A1 (de) | 2017-10-26 | 2019-05-02 | Wabco Gmbh | Achsventilmodul und Relaisventilmodul einer Druckluftbremsanlage |
US10479336B2 (en) | 2015-07-16 | 2019-11-19 | Volvo Construction Equiptment AB | Vehicle brake system |
DE102018122193A1 (de) * | 2018-09-12 | 2020-03-12 | Wabco Gmbh | Relaisventilmodul zur Verwendung als Achsmodulator und Anhängersteuermodul |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8869831B2 (en) | 2011-05-25 | 2014-10-28 | Bendix Commercial Vehicle Systems Llc | Variable configuration traction valve |
US8465107B2 (en) | 2011-06-15 | 2013-06-18 | Arvinmeritor Technology, Llc | Regenerative air brake module |
US9120474B2 (en) | 2011-06-15 | 2015-09-01 | Arvinmeritor Technology, Llc | Mechanical bypass valve for regenerative air brake module |
CN106347340B (zh) * | 2016-11-16 | 2023-04-28 | 眉山中车制动科技股份有限公司 | 一种用于控制容积室充气缓解位与制动位转换的分配阀 |
US10315636B2 (en) | 2017-05-09 | 2019-06-11 | Haldex Brake Products Corporation | Tractor protection valve |
CN108944886A (zh) * | 2018-08-20 | 2018-12-07 | 王汉峰 | 一种制动阀 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3861754A (en) * | 1973-04-19 | 1975-01-21 | Bendix Corp | Inverting limiting relay valve with interlock |
US4121873A (en) * | 1976-11-03 | 1978-10-24 | Midland-Ross Corporation | Vehicle air brake system with emergency features |
US5340212A (en) * | 1993-03-24 | 1994-08-23 | Allied-Signal Inc. | Proportioning relay valve disabled by failed front braking circuit |
US6116280A (en) * | 1999-09-10 | 2000-09-12 | Goodell; David J. | Spring brake valve having a balance piston with integral quick release |
US6386649B1 (en) * | 1999-10-01 | 2002-05-14 | Alliedsignal Truck Brake Systems | Two solenoid pressure modulated relay valve with integral quick release function for ABS |
US6769744B2 (en) * | 2000-05-25 | 2004-08-03 | Bendix Commercial Vehicle Systems Llc | Spring brake modulating relay valve |
US6655750B2 (en) * | 2001-10-19 | 2003-12-02 | Meritor Wabco Vehicle Control Systems | Combination inversion and relay or quick release valve assembly |
US20060076824A1 (en) * | 2004-10-12 | 2006-04-13 | Meritor Wabco Vehicle Control Systems | Park brake valve assembly |
US8297713B2 (en) * | 2007-04-18 | 2012-10-30 | Meritor Wabco Vehicle Control Systems | Full function tractor protection valve |
-
2006
- 2006-02-16 US US11/355,383 patent/US7658453B2/en not_active Expired - Fee Related
-
2007
- 2007-02-07 EP EP07250504A patent/EP1826085A2/de not_active Withdrawn
Non-Patent Citations (1)
Title |
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None |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102069791A (zh) * | 2010-12-22 | 2011-05-25 | 芜湖盛力制动有限责任公司 | 一种重型卡车制动***的差动继动阀 |
ITMI20111121A1 (it) * | 2011-06-21 | 2012-12-22 | Catai S R L | Impianto frenante di assali di ruote di un rimorchio |
EP2537724A1 (de) * | 2011-06-21 | 2012-12-26 | Catai S.r.l. | Bremssystem für die Radachsen eines Anhängers |
US10479336B2 (en) | 2015-07-16 | 2019-11-19 | Volvo Construction Equiptment AB | Vehicle brake system |
CN106114486A (zh) * | 2016-07-14 | 2016-11-16 | 徐州重型机械有限公司 | 一种abs电‑气控继动阀 |
CN106114486B (zh) * | 2016-07-14 | 2019-01-04 | 徐州重型机械有限公司 | 一种abs电-气控继动阀 |
DE102017009954A1 (de) | 2017-10-26 | 2019-05-02 | Wabco Gmbh | Achsventilmodul und Relaisventilmodul einer Druckluftbremsanlage |
WO2019081101A1 (de) | 2017-10-26 | 2019-05-02 | Wabco Gmbh | Achsventilmodul und relaisventilmodul einer druckluftbremsanlage |
US11511719B2 (en) | 2017-10-26 | 2022-11-29 | Wabco Gmbh | Axle valve module and relay valve module of a compressed-air brake system |
DE102018122193A1 (de) * | 2018-09-12 | 2020-03-12 | Wabco Gmbh | Relaisventilmodul zur Verwendung als Achsmodulator und Anhängersteuermodul |
WO2020052903A1 (de) | 2018-09-12 | 2020-03-19 | Wabco Gmbh | Relaisventilmodul zur verwendung als achsmodulator und anhängersteuermodul |
US11926294B2 (en) | 2018-09-12 | 2024-03-12 | Zf Cv Systems Europe Bv | Relay valve module for use as an axle modulator and trailer control module |
Also Published As
Publication number | Publication date |
---|---|
US20070188016A1 (en) | 2007-08-16 |
US7658453B2 (en) | 2010-02-09 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20140902 |